Stroker and mounting for sanding machines



Jan. 1, 1935. D. s. OAKLEY STOKER AND MOUNTING FOR SANDING MACHINES Filed Jan. 22, 1954 4 Sheets-Sheet 1 INVENTOR 0 ATTORNEY I fia 0550 2? Jan. 1, 1935. D, s. OAKLEY STOKER AND MOUNTING FOR SANDING MACHINES 4 Sheets-Sheet 2 Filed Jan. 22, 1934 INVENTOR Jan. 1, 1935. D. s. OAKLEY STOKER AND MOUNTING FOR SANDING MACHINES INVENTOR 4 Sheets -Sheet 3 Filed Jan. 22, 1934 ATTOR NEY Jan. 1, 1935.'

STOKER AND MOUNTING FOR SANDING MACHINES Filed Jan. 22. 1954 4 Sheets-Sheet 4 INVENTOR A 4 A md/ ATTORNEY D. s. OAKLEY v 1,986,521

Patented Jan. 1, 1935 r i :;HJ..F;: v

M .1 ,9ss,5 21 a 1 srnoKEa AND MbUNTING FOR SANDING I MACHINES David s. oakleyd Bi-istol, Tat; Application JanuaLryIZZ, 1334,.SrialNot 707,522 13 Olaims (Cl. 51 -143 Theinvention relates to astroker and mountand pol shing of work, readily andeasily adjusted, ing for sanding-machines and more especially to and inexpensive to manufacture and install: an attachmentvof this character for single or ;Wi th these andother objects in view, the indouble belt sandingmachines. g 1 vention consists in the features oi construction, 9:5 "Ihe primary-object of the invention is the combination and arrangement of parts as willbe g 5 provision of an attachment of 1 this character, hereinafter more fully describedin detail, illuswherein a strokerfor the belt or belts of. sanding trated in the accompanying drawingawhichdismachines is so supported that it can be posiclose the preferred embodiment of. the invention, tionediand manipulated to have the sandingbelts and pointed out in the claims hereunto appended. l0 operate upon the work for the sanding and polish- LInthe accompanying'drawings: l p 1 i ing of the same,the strokerin its entirety being 1 Figure 1' is a sideelevation'of a sanding and of novel construction and susceptible of varying polishing machine; showing-vibe stroker and pressures according to the requirements injthe mount therefor constructed in accordance with sanding and. polishing operation of, the machine. the invention; 11-, as Another object of the invention is the provi- Figure 2 is'afragxnentary sectional view on the sion of an attachment of this character, wherein line 2-2 of Figure, 1, looking in the directionof thestroker is susceptible of positioning with re the arrows. l 3 1' :spect. to i a :single :or double abrasive belt of a I Figure 3is a fragmentary:sectionalrviewon the sanding machine, whether the abrasive face or line-3s-.3 of'Figure 1, looking in the-direction of 2.9 faces thereof be outside or insideoffthe belt' or ithetarrows. q belts, and such stroker is conveniently manually "Figure :4 is, a fragmentary top plan view of the handled for the successful and accurateisanding fstroker mount, theIset screw-for theguide track and polishing of a pieceof material to assure a beinginusection. to disclose in detail the extent true contact of the belt or belts withthe surface of shiftof such track; s 1 1 I of the material during the sanding or pol shing Figurei5is'a fragmentary sectional view on the of the same whenthe machine is operating. line '5--5 of Figure 4; looking inthe direction of A further objecto'f the invention is the provitherarrows. r sion'of an attachment of thischaracter, wherein Figure 6 is'afragmentary sectional viewon the t the stroker head is yieldably and universally llineJG-fi of Figure -4,.1ooking in the direction of .30 mounted to assure a'uniform contact throughout the arrows. I 1 it 1 the attaching area of an abrasive belt or belts so Figure. 7 is a sectional view on the, line 77 of; that the stroker will be self-adjusting. according Figure 4, looking in the direction of thearrows. tothe lay of the work or piece of material opera Figure 8 is an enlarged vertical transverse secatedupon and auniformity "of pressure of. the tional view through the stroker, taken on the abrasive-belt or belts will be upon the-work line"8'8 of Figure 9 looking. inflthe' direction of during the travel thereof in theoperation of the the arrows 1 1 machine and thus accuracy and a proper finish Figure 9 is a sectional view onthe1ine 9--9'of obtained while the work is being sanded or Figure 8, lookingfin the direction'offthe arrows. 1 polished. 1 1 t Figure 10 is a sectionalviewonthe linelO- -IO Q 0 A still further object'of the invention is the of Figure 9, lookingin the-'direction' of' the arprovision of an attachment of this character, rows; .9 r 1 l wherein the stroker can be broughtinto proper Figure 11 is a sectional view on'the line=11 11 relation to'anabrasive beltor belts of a sanding of "Figure '9, looking in the directionof the ar- 1 and polishing machine for stroking action thererows.

on, to have the same work upon the material or "Figure 12 is .a sectional view on the line 12--12 45 piece of work for the proper sanding and polishof Figure 11, looking in the directionof the aringi-thereof, the stroker being mounted for conrows. 1 1 l l venience-and easy handling by the operator of Figure 13 is a sectional'viewonthe line 13 -13 the machine and being readily and quickly located of Figure 8', looking inthe direction of the arrows. and manipulated by saidoperator. 1 l

A still further object of the invention is the ofFigure 8,looking in the direction of the arrows. provision of an attachment of this character Figure 15 is a sectional View on theline 1515 which 1 is comparatively simple construction, of Figure 8, looking'in the. direction of the arrows. thoroughly reliable' -and efficient initspu'rpose, Figure 16 is an enlarged :detail plan view of 5 assuring trueness'and accuracy intheu-*sanding zthe base frame :of the carriage. J Y

Figure 14 is a sectional view on the line 14-44 Figure 17 is a top plan view of the side plate of the carriage.

Figure 18 is a side elevation of a slight modification of stroker and mount.

Figure 19 is a fragmentary side elevation of the structure shown in Figure 18 except that the stroker has been diiferently located with respect to the sanding belt of the sanding and polishing machine, the belt in Figure 18 being an inside sander and that in Figure 19 an outside sander. Similar reference characters indicate corre-= sponding parts throughout the several views in the drawings. 1 i. 7

Referring to the drawings indetail, except Figures 18 and 19 there is generally shown a sanding and polishing machine comprising end stands A and B and an intermediatework supporting stand 0, respectively, and such end stands carry the pulleys 10 and 11 for traveling sanding and polishingbelts 12, therebeing preferably-two arranged in' spaced edge to edge relation to each other, one being a rough sanding belt andthe. other a fine sanding or polishing belt. The pulleys 10 are the power pulleys and each isdriven; from an'electric motor 13, while the pulleys llarethe' guide pulleys for said belts, and the detailed construction of said sanding and polishing machine is the subject matter of an application for' patent filedon or about the 22nd day of January, 1934and bearing thetitle Sanding machine and Serial No. 707,821, which machine constitutesnofpart of the present invention hereinafter fully described. Y f

The attachment constituting the present in- ;vention comprisesa pair of standards 14 and 15. respectively, thelatter being a straight one ,while the standard 14 is of curvilinear contour this being required of the latter due to the fact that the same is" secured to the end stand B, while the standard 15 is secured to the end stand A. Each standard 14and 15 has formed at its upper-"end an elongated guide head 16 provided with an undercut channel or groove 17 therein, this terminating a distance 'removed'from both endsof 'said head. Superimposed 'upon these 'hea'd's 16of the standards I4 and 15 is a double rail track including the spaced parallel side rails 18' and'19, respectively, the spacer pieces 20' and 'end blocks 21, respectively, the rails being bolted or otherwise made fast to the pieces and blocks, ias'at 22, to effect theirigid unitary track. Each enda'block 21 has. centrally formed therein an elongated slot 23 for accommodating a set screw "24' threaded'into a sliding wedge '25 fitting the iundercutfgrooveor. channel 17 in the head 16. It should be apparent that the track as aunit 'canbe, longitudinally displaced and laterally shifted with respect to the sanding machine upon the heads 1610f the standards 14 and 15. The set screw" 24,:wnen tightened, locks the track in its moved or shifted position and thus assuring .alignmentjof'suchtrack with respect to the belt or belts '12 of the sanding machine. Each head 16 has thereon an upstanding bearing 26 carrying "anadjustable abutment screw 27 for' the track'to' regulateand determine the movement in one direction of such track laterally with re- 'spect'to the machine; Thezfact that the channel or groove 17 isremoved'from one 'end of each :head'16 permits the'sli'ding wedge 25'to be extracted or removed from this groove or channel so that such track can be readily released from the. standards 14 and 15' when the occasion irequiresmThei screws 27; when adjusted, will prevent the accidentarremovar of the Sl d track in the mounting thereof on theheads of the standards can be shifted on theseheads so as to be moved out of the way of an operator when using a hand stroker upon the belts 12 for the sanding and polishing of a piece of work by such belts during the operation of the machine. Movable upon' the track is a carriage which comprises a body section 28 having the seats 29 and 30, respectively, for upstanding bearings 31 and 32, these supporting upper traction rollers 33 which have straight traction peripheries and are movable upon the upper edges of the rails 18 and 19 of the track, while formed with the body section, at the underside thereof, are bearings 34 for the lower rollers 35 and 36, respectively, the rollers 35 being peripherally grooved, as at 37, to receive the tapered tread 38 at the lower edge of the rail 18 of the track, while the roller 86 is alike to the rollers 33 and designed totravel on the lower edge of the rail 19 of said track.

By the construction of the rollers 35 the carriage will be interlocked with the track and thus be prevented from running off of the same.

The carriage equipped with the rollers 33, 35

and 36 carries spring pressed wipers 38 for the rails 18 and 19 of the track to keepthe same clean during the operation of the sanding and polishing machine and manipulation of the stroker.

The body section 28 is formed with a projected frame 39 and fixed to the underside of the said body section, to be disposed transversely of the carriage are the spaced guide rails 40 for a shiftable slide 41, this carrying a resilient bumper 42 alternately engageable with stops 43 integral with the said bodysection at the under face thereof, so that the slide will be limited in its movement to the extent between the said stops 43. The

slide 41 isformed witha central boss 44 in which is slidably fitted a stem or post 45', the same being also slidably fitted in'a brace arm 46 unitary withthe body section 28. This stem or post 45,

at its lower end, has the ball and socket coning from the head 48. These pins have about the same coiled tensioning springs 51 which work against the spider 49 and against tensioning nuts '52 upon said pins 50. Thus it will be seen that the head 48 is tensioned and is self-adjusting for uniformity of contact with a part.

Detachably clamped over the working side of 'the head 48 is a covering 53 enveloping a cushion or pad 54 which is inwardly of the covering 53 and against the'said head, the covering 53 being removably clamped to the head by the fasteners'55.

About the stem or'post 45, between the brace 46 and the boss 44', is a collar 56, the same being fixed to said stem or post-by a pin 57, and hinged to this collar 56 by a pivot 58 is the fork-59 for ajhandlef or manually operable lever 60. The

'arms 61 of said fork are connected by a pivot 62 to a link 63 which, by the pivot 64, is swingingly connected to the brace 46 for suspension beneath the body section 28 of the carriage.

- Forwardly of the stem 'or post 145 land :fixed'in .Ithe slide4=1is a dependingguide bolt 65, the same "bei'ng slidable throughan eye 66.on thelicollar 56 and supporting a 'coiled expansion spring 6'? i at its lower end, which spring .is seated upon an adjusting nut 68-on the beltand pIaysagainSt,

. the eye 66 so asto holdthe head 48 normally xneutralsor inraised position out of contact with either'beltlZ of the sanding and polishingmachine.

It. should be apparent that by manually mov- .1

Jing the handle Blithe stroker can be shifted longitudinally on the track rails .18 and "l9uor the slide'41 moved laterally or transversely of the carriage, aswell'as depressing the head 48, which latter, by the universal connection; isfiexible for a'firmcontact with either belt 12in the operation ofthe sanding and'p'olishingmachine.

a and also to cushion such carriage at the limits of .1

" p The rail 18 of the track has 'mounted thereon, near opposite ends of. said track, the "bumpers 69 to limit the throw 'ofJthe carriage on the track its strokes.

i The carriage is equipped. with electric light -bulbsl70 which depend therefrom and ,are'servicei- Iable to a user of the machine. I i

In,-Figures 18 and 19 of thevdrawings there is shown a slight modification of stroker equipment, wherein thetrack '71 for the carriage '72 is supported upon pedestalsp73 and such traokis sus- .ceptible of being shifted laterally on these, pedestals so that said track canbe properly located with respect to the sanding and polishing machine belt '74 and which machine, in this instance,

\isof the single belt type. They-carriage 72 has the stroker head 75 stationarily mounted thereon.

When it is desired to operate head 75 not interfere actionof the belt 74..

a hand stroker the track '71 ismoved laterally to one. side of the machine soas to be out of the way and have the with the hand stroking abrasive is atthe inside of the belt, it beingapparent that the pedestals 73 can be" of the desired height to locate ,the head 75foremost with relation to thebelt 7.4 or between ,lthe "upper and lower Band 19. v V r From the foregoing it is thought that the 0on struction and manner of operationbf the stroker attachment for the sanding and polishing machine pended claims without ever, it

will be clearly apparent and, therefore, a more extended explanation has been omitted. Howis to be understood that changes, variations and modifications may be made in the structure as fall properly within the scope of the apdeparting from the spirit of the invention or sacrificing any of its advantages.

What is claimed is:

, 1. The combination of a pair of uprights adapted for location with respect to a sanding and polishing machine having a traveling belt, a track supported upon said uprights for longitudinal and lateral adjustment, a carriage movable upon the track, a stroking head supported by the carriage for vertical movement, and a handle operatively connected with said head for lowering thereof into contact withthe belt.

The/pedestals warm: the

the' beveledtread of one rail stretches thereof as doesjappear,insaid Figures 1 2. The combination of a pair of uprights adapt ed for location, with respect to a sanding and polishing machine having a trave1ing belt,a track supportedupon said uprights forilongitudinal and lateral adjustment, a carriage movableuponthe,

track, a stroking head supported by the carriage for vertical movement, a handleoperatively connectedwith said head for lowering thereof into contact with the belt, and means yieldably supparting said head. l 3. Thecombination of a pairof uprights adapted forvlocation with respect to a sanding and polishing machine having atraveling belt, a track supported uponsaid uprights lateral adjustment, a carriage movable upon the track, a stroking head supported by the carriage for vertical movement, a handle operatively connected with said head for lowering thereof into contact with the belt, means yieldably supporting said head, and a universalconnection between the head and its supporting means.

ishingmachinehaving a traveling belt, a track supported upon said uprights for longitudinal and lateral adjustment, a carriage movable upon the track, a stroking head supported by'the carriage forvertical movement, a handle operatively connected with-said head for lowering: thereof into contact with the belt, means yieldably supporting said head, a universal connection between the head and its supporting means, and a slide fitted in the carriage and carrying thehead supporting means,

5. The combination of a pair of uprights adaptedfor locationwith respectto a sanding and polishing machinehaving a traveling belt, a track supported upon said uprights for longitudinal and lateral adiustment, a carriage movable upon the track, a stroking contact with the belt, means yieldably supporting 'said 'head, a-univeisal connection between the head and its supporting means, a slide fitted in 1 ablewith the rails, certain of the traction rollers 9 being peripherally groovedfor interfitting with 6; fI'he' combination of a pair of uprights adapted forlocation with respectto asanding and polishing machine having a traveling-belt," a track supported upon said uprights for longitudinal and lateral adjustment, a carriage movable upon the track, astroking head supported by the carriage for vertical movement, ahandle operatively connected with said head for lowering thereof into contact with the belt, means yieldably supporting said head, a universal connection between the head and its supporting means, a slide fitted in the carriage and carrying the head supporting means, a pair of rails included with said track, one of said rails having a beveled tread, traction rollers carried by said carriage and engageable with the rails, certain of the traction rollers being peripherally grooved for interfitting with the beveled tread of one rail, stops on said carriage, and

a resilient bumper on the slide for abutment with said stops.

7. The combination of a pair of spaced stands,

for longitudinal and 4. Thecombination of apair of uprights adetpted for location with respect to a sanding and polhead supported by the carriage for vertical movement, ahandle operatively connected with said head for lowering thereof into :movable on the track and having rollers traversing the double rails, and a stroker head on the carriage and movable to operative and'inoperative positions with relation to the respective belts.

8. The combination of a pair of spaced stands, uprights fixed to said stands and having a mate'- rial lateral spread, a pair of traveling abrasive ,belts mounted upon the stands for lateral dis- ,placementjwith respectuto the uprights and dis;

jposed edge'to edge, a double rail track supported for-sidewise movement onthe uprights, a carriage movable on the track and havingv rollers traversing the double rails, a stroker head on the carriage and movable to operative and inoperative positions with relation to the respective belts, and means for moving the double rail track in the sidewise direction.

I 9. The "combination of a pair of spaced stands, uprights fixed to said stands and having a mate.- rial, lateral spread, a pair of traveling abrasive belts mounted upon the stands for lateral displacement with respect to the uprights and disposed edge to edge, a double rail track supported for sidewise movement on the uprights, a carriage movable on the track and having rollers traversing the double rails, a stroker head'on the carriage and movable to operative and inoperative positions with relation to the respective belts, means for-moving the double rail track in the sidewise direction, and means for securing the said track in its adjusted position. v

' 10. The combination of a pair of spaced stands, uprights fixed to said stands and having a material lateral spread, a pairof traveling abrasive belts mounted upon the stands 'for lateral-displacement with respect to the uprights and disposed edge to edge, a double railtrack-supported for sidewise movement on the uprights, a carriage movable on the track and having rollers traversing the, double rails, a stroker head on the carriage and movable to operative and inoperative positions with relation to the respective belts,

means for moving'the double rail-track in the sidewise; direction, means for securing the said track in its adjusted position, anda source of power on oneof the stands and operating said belts;

' 11. The combination of a pair of spaced stands, uprights fixed to said stands and having aymaterial lateral spread, a pair of traveling abrasive belts mountedupon the stands for lateral disbelts mounted upon the stands for lateral dis- ;placement with respect to the uprights and disposededge to edge, a double rail track supported placement with respect to the uprights and dis- :posed edge to edge, a double rail tra'ck supported for sidewisemovement on the uprights, a carriage movable on the track and having rollers traversing the double rails, a stroker head on the carf riage and movable -to operative and inoperative positions with relation to the respective belts, means for moving the double rail track in the sidewise direction, means-for securing the said track in its adjusted position, a source of power on one of the stands and operating said belts, and means for mounting the. head for universal movement and yieldability. I

12. The combustion of a pair of spaced stands, uprights fixed to said stands and having a material lateral spread, a pair of traveling abrasive belts mounted upon thestands for lateral displacement with respect to the uprights and disposed edge'to edge, a double rail track supported for sidewise movement on the uprights, a carriage movable on the track and having rollers traversing the double rails, a stroker head on the carriage and movable to operative and inoperative positions with relation to the respective belts, meansfor moving the double rail track in the sidewise direction, means for securing the said track in its adjusted position, a source of power on one of the stands and operating said belts, means for mounting the head for universal movement and yie1dability,'and manually operated means for bringing the head into active position with relation to said belts.

13. The combination of a pair of spaced stands, uprights fixed to said stands and having amaterial lateral spread, a pair of traveling abrasive belts mounted upon the stands for lateral displacement with respect to the uprights and disposed edge to edge, a double rail track supported for sidewise movement on the uprights, a carriage" movable on the track and having rollers traversing the double rails, a stroker head on the carriage and movable to operative and inoperative positions with relation to the respective belts, means for moving the double rail track in the sidewise direction, means for securing the said track; in its adjusted position, a source of power onone of the stands and operating said belts, means for mounting the head for universal movement and yieldability, manually operated means for bringing the head relation to said belts, and spring pressed wipers on the carriage' and engaging parts of the rails of the trackfor the cleaning of-"said' rails.

into active position with v 

